>Did someone knows about compiler generators that support uni-code in>literal strings (tools like lex, yacc...)? uni-code is an extension>of ASCII character set to cover characters coming from 'all'>languages.

SandStone's Visual Parse++ supports Unicode (www.sand-stone.com).

LPM 2.0, which is currently being beta'd, also now supports Unicode
(at the request of an LPM 1.0 user in Japan who was very persistent
with his request for me to add Unicode support). The grammar
generator only runs under Win32 systems for the time being, but the
generated grammars themselves are portable to an assortment of C++
compilers.

Beta 1, now in progress, is weeding out the cross-platform compilation
issues, beta 2 will weed out the grammar class generator issues, and
then I will be making it available free for all compiled use.